I am just curious as to what a GFB WRX stealth FX BOV does to increase the hp and tourque in a 2003 WRX. Does anybody know the answer. Also what is a good MBC to get....

Does the Stealth FX fit a 04 WRX?

 

bov's do not give u any gains when it comes to power. however i have read elsewhere that it helps you spool your turbo a little faster, and on top of that it gives the famous "woosh" or high pitched "psssttt" noise, depending on what brand you go with. Brands like Turbo XS, GFB give u the woosh, while the HKS i believe gives you the high pitched sound. I may be wrong, so just do a forum search on it if you really need to find out more. I hope this helps.

 

How about the BLitz DD BOV? Does anyone know if it is adjustable or just 100%......

 

Does the sound depend on 100% atmosphere or not? The ones that recylce are better for your engine right? What is the minu's of running rich, or going with a 100%atmosphere BOV?

 

i'm no mechanic or anything, but the sound doesn't depend on whether or not the bov is set at 50%. Technically, set at 50/50, the GFB is really quiet. however, other than the GFB, i cannot think of any other bov that lets u choose between 5050 or 100% atmo dump. normally some sites will have sound clips of how that specific bov sounds like. Try looking around, i'm about to go to school, maybe later in the day i can find u the site with sound clips, but in the meantime, i was thinking of purchasing either a Turbo XS type H or a RFL. i have sound clips from a site uploaded to my briefcase, check it out at

http://briefcase.yahoo.com/azn121184@sbcglobal.net

it's in the wrx folder. Hope this helps

-law

 

No need to get that site, I have it already. I am just curious to know what one has the best specs as far a most possible PSI and best sound without hurting the car. Right now I like the Greddy type-s. I heard it has 30psi, and adjustable 50/50....

 

do u use aim? if u do, im me at azn121184. I would like to hear more different type of bov sounds. From what i heard, the 5050 vent bov are the best bov to get for your car without hurting performance, but i'm also told while running at 5050, it's really soft so they just put it to 100% atmo dump anyways. If you have any sites for greddy or blitz BOV's please post them because i still haven't heard those yet. Thank you

 

That is what I expected from the 50/50 though. It is a little louder than stock, but still carries the function or recycling without suffering running rich.

I just want to know if anyone has greddy type s on there WRX? What is the highest boost recommended to be added. I was hoping to get a mbc and BOV to possibly get 17/16 psi........

the website is just blowoffvalves.com

 

i believe on everything stock, u can run the stock turbo with a MBC up to...16 psi's? i believe there has been threads about the highest psi u can get on the turbo before the CEL light turns on.

 

It says it has 5 settings to adjust, but I don't see how, there is no screw..... Also I don't excpect it to improve performance, just possible PSi.... If I get a BOV and an MBC, then I better see some performance changes

When changing the stock BOV, what adjustments do I need to make if any other than just installing it and go?

 

BOV does nothing for performance over the stock BOV unless you've done a great deal of other modifications already... and I mean a lot.

In one way or another changing the BOV to a less than 100% return type is not optimal for the way your engine is setup. Some people get away with it, some people don't. Just like some people mysteriously get bad detonation under the same conditions with the same year/model wrx while most don't.

Pretty much its good for a neat sounding BOV. The less return it has (so more atmo) the louder it will be. Shop according the the sound and volume you're looking for, because there's no reason to shop for an aftermarket BOV by rating performance.

jason